178390 ÷ 99 
We want to figure out the number of times 178390 can be divided by 99.

Step 1:
99 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 99

On to step 2:
When dividing 17 by 99, we get 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Grab the next digit (8) from the dividend, add it to 17, then carry on: 178 / 99

Let's proceed to step 3:
The number 99 fits into 178 1 times, leaving a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 99 from 178 leaves us with 79.
Append the next digit (3) from the dividend to 79 and continue with: 793 / 99

Let's proceed to step 4:
99 goes into 793 8 times with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
Deduct 792 from 793 and we're left with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 99

On to step 5:
If we divide 19 by 99, we get 0 and a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 180.0
Subtract 0 from 19 to get 19.
Grab the next digit (0) from the dividend, add it to 19, then carry on: 190 / 99

Let's proceed to step 6:
99 can be fit into 190 1 times, resulting in a remainder of 91.
The number 1 becomes the next digit in our result. 
Result so far: 1801.0
If we take 99 away from 190, we end up with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Moving on to step 7:
910 divided by 99 is 9 with a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 1801.9
Subtracting 891 from 910 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 8:
The number 99 fits into 190 1 times, leaving a remainder of 91.
The number 1 becomes the next digit in our result. 
Result so far: 1801.91
If we subtract 99 from 190, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Let's proceed to step 9:
99 goes into 910 9 times with a remainder of 19.
Record the quotient 9 as the next digit in the result. 
Result so far: 1801.919
If we subtract 891 from 910, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 10:
99 can be fit into 190 1 times, resulting in a remainder of 91.
Write down 1 as next digit of the result. 
Result so far: 1801.9191
Subtract 99 from 190 to get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Going ahead to step 11:
If we divide 910 by 99, we get 9 and a remainder of 19.
Put 9 as the next digit of the answer. 
Result so far: 1801.91919
If we subtract 891 from 910, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 12:
If we divide 190 by 99, we get 1 and a remainder of 91.
The number 1 becomes the next digit in our result. 
Result so far: 1801.919191
Subtract 99 from 190 to get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Advancing to step 13:
910 divided by 99 is 9 with a remainder of 19.
The number 9 becomes the next digit in our result. 
Result so far: 1801.9191919
If we take 891 away from 910, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 14:
99 can be fit into 190 1 times, resulting in a remainder of 91.
The number 1 becomes the next digit in our result. 
Result so far: 1801.91919191
Deduct 99 from 190 and we're left with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

After the division, we end up with 1801.91919191 and a remainder of 9.1e-08.